No problem, we've got 3629 and 7820 to multiply
3629 × 7820 = 7820 × (3629)
+ 7820 × 9 resulting in 70380
+ 7820 × 20 that equals 156400
+ 7820 × 600 giving us 4692000
+ 7820 × 3000 resulting in 23460000

= 28378780
